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Showing 11301 to 11350 of 22070 works
Integrating Remote Sensing and Machine Learning for Groundwater Withdrawal Estimation in Arizona
Groundwater is the largest source of Earth’s liquid freshwater and plays a critical role in global food security. With the rising global demand for drinking water and increased ag…
Sharp Downward Branch of the Walker Circulation above the Indian Ocean
Climatological features regarding the sharp downward branch (SDB) of the Walker circulation above the Indian Ocean are comprehensively investigated. Compared to the Pacific downwa…
Size-fraction specific isotopic variations as a framework for interpreting early Paleogene bulk sediment carbon isotope…
Carbon isotope (δ13C) records from marine sediments have been extensively used in Cenozoic chemostratigraphy. The early Paleogene interval in particular has received exceptional a…
Low-vertical-wavenumber hump in the internal wave energy spectra observed in the Antarctic Circumpolar Current region
Finescale parameterizations are powerful tools for estimating the global distribution of turbulent dissipation rates ε. However, they tend to overestimate ε in the Antarctic Circu…
Evaluating Monin-Obukhov Scaling for the Turbulent Ocean Surface Layer
Turbulent flow in surface layer, the top few meters in the ocean, tends to exhibit consistent and repeatable characteristics, and useful empirical laws can be formed to shed light…
Observational Constraints on the Great Filter
The search for spectroscopic biosignatures with the next-generation of space telescopes could provide observational constraints on the abundance of exoplanets with signs of life. …
Global Driving of Auroral Conductance - Balance of Sources & Numerical Considerations
We present latest results from the Conductance Model for Extreme Events (CMEE) and the Magnetosphere-Ionosphere-Thermosphere (MAGNIT) Conductance Model. Both models have been inte…
CAS FGOALS-f3-L large-ensemble simulations for the CMIP6 Polar Amplification Model Intercomparison Project
Large-ensemble simulations of the atmosphere-only time-slice experiments for the Polar Amplification Model Intercomparison Project (PAMIP) were carried out by the model group of t…
Slow slip events in the Kanto and Tokai regions of central Japan detected using GNSS data during 1994-2020
Slow slip events (SSEs) along subduction zones play an important role in accommodating relative plate motion. SSEs interplay with large megathrust earthquakes and other slow earth…
Evaluation of hydrometeor types and properties in the ICON-LAM model with polarimetric radar observations
A direct comparison of hydrometeor types (HMT) from state-of-the-art hydrometeor classification schemes (HMC) with modelled hydrometeors (ICOL-LAM, operational weather predictions…
A Generalized Mixed-Cell Method for Eulerian Network Transport Modeling
Pore network models are efficient tools for upscaling flow and transport properties in porous media. This work introduces a new formal mathematical derivation of the discrete equa…
Assessing synergistic radar and radiometer capability in retrieving ice cloud microphysics based on hybrid Bayesian alg…
The 2017 National Academy of Sciences Decadal Survey highlighted several high priority objectives to be pursued during the next decadal timeframe, and the next-generation Cloud Co…
Circulation of Radon progeny in the terrestrial atmosphere during thunderstorms
We describe a new phenomenon in atmospheric physics – 222Rn progeny circulation during thunderstorms. The enhancement of the natural gamma radiation during thunderstorms was measu…
Making 13 sigma dynamical mass measurements for the components of the HD 104304 binary system using radial velocities a…
Combining direct imaging astrometry and long-baseline radial velocity (RV) measurements of stellar binaries can provide precise constraints on their 3D orbits and yield dynamical …
Lunar Plasma Environment in Cases with Extreme Solar Wind Conditions: First Results from 3-D Hybrid Kinetic Modeling an…
The study of lunar plasma environment’s response to the extreme solar wind condition is the main subject of our investigation in this report. The computational model includes the …
Comparative Study of the Ability of Three Martian Simulants to Support Bacterial Growth
One key question about Mars is whether life has been or still is present on or beneath its surface. For life to flourish, it requires a habitable environment with the appropriate …
Climate Change Driven “Anthropocenes”: Are They Common Among Exo-Civilizations?
We seek to model the coupled evolution of a planet and a civilization through the era when energy harvesting by the civilization drives the planet into new and adverse climate sta…
The origin of the sediment yield of the Ob' and the Yenisei
Abstract Introduction: Nowadays it is nebulous how much matter is delivered by the largest rivers into the Arctic ocean and how much sediments are eroded by bank and watershed ero…
Size-dependent Molecular Characteristics and Possible Sources of Organic Aerosols at a Coastal New Particle Formation H…
We investigated size-dependent molecular characteristics of coastal organic aerosols from < 0.032 μm to 3.2 μm at a new particle formation (NPF) hotspot of east China by using Fou…
Extracting near-field seismograms from ocean-bottom pressure gauge inside the focal area: application to the 2011 Mw 9.…
Recent studies have shown that ocean-bottom pressure gauges (OBPs) can record seismic waves in addition to tsunamis and seafloor permanent displacements, even if they are installe…
Stress field estimation from S-wave anisotropy observed in multi-azimuth seismic survey with cabled seafloor seismomete…
The spatial variation of azimuthal S-wave phase velocity anisotropies caused by differential horizontal stress along the subducting plate at the Nankai Trough was analyzed to unde…
Collided with COVID-19 pandemic, the 2020 Yangtze flood is exceptionally severe.
During June to July, 2020, persistent heavy precipitation in the Yangtze River Basin (YRB) is resulting in extensive flooding, with over 158 fatalities and tremendous economic los…
Singing comet waves in a solar wind convective electric field frame
The cometary plasma environment at low gas production rates is dominated by highly compressional, large amplitude magnetic field waves in the 10-100mHz range. They are thought to …
New Machine Learning Method for Integrated Subsurface Modeling
Subsurface characterization is important for the detection and development of underground resources. Useful subsurface models can correctly make production forecast and optimize d…
Possible next steps of the YMC - What we learned and obtained
Years of the Maritime Continent or YMC was designed to improve our knowledge of the weather-climate systems over the MC and their numerical simulation and prediction skill. Since …
A Bayesian Method for Real-time Earthquake Location Using Multi-Parameter Data
A primary task of a network-based, earthquake early warning system is the prompt event detection and location, needed to assess the magnitude of the event and its potential damage…
Contributions of World Regions to the Global Tropospheric Ozone Burden Change from 1980 to 2010
We investigate the contributions of emission changes from 10 world regions, as well as the global methane concentration change, on the global tropospheric ozone burden change from…
Influence of Agricultural Managed Aquifer Recharge and Stratigraphic Heterogeneities on Nitrate Reduction in the Deep S…
Agricultural managed aquifer recharge (AgMAR) is a proposed management strategy whereby surface water flows are used to intentionally flood croplands with the purpose of rechargin…
Asymptotic analysis for late coda correlations under different geometric distributions of earthquakes
Some features in late coda correlations have now been commonly treated as “the inter- station body waves”. In general, however, large earthquakes releasing coda waves mostly situa…
Short-scale variations in high-resolution crystal-preferred orientation data in an alpine ice core - do we need a new s…
We analysed crystal-preferred orientation of c-axis and microstructure data from the Alpine ice core KCC at an unprecedented resolution and coverage of any Alpine ice core. We fin…
First results of a model user survey on a micro-scale model data standard
Micro-scale models are important to assess processes in complex domains, for example cities. The most common data standard for atmospheric model output data are the CF-conventions…
Laboratory Demonstration of Spatial Linear Dark-Field Control for Imaging Extrasolar Planets in Reflected Light
We present the first laboratory tests of Spatial Linear Dark Field Control (LDFC) approaching raw contrasts (5e-7) and separations (1.5–5.2 lambda/D) needed to image jovian planet…
RENU2 Rocket Observations of Fine-Scale Thermal Ion Upflow, Downflow, and Temperature
We present an analysis of in-situ thermal ion measurements from a cusp auroral sounding rocket. Using a forward modeling procedure, we find most-probable thermal ion temperature a…
On the dependency of Atlantic Hurricane and European Windstorm Hazards
The Atlantic Hurricane season and the European Windstorm season are found to be co-related in a seasonal forecast model. The probability of extremes occurring in both seasons is c…
Seasonal variations of the Bransfield Current: dynamic horizontal/vertical structure and transport
The Bransfield Strait is a semi enclosed region located between the Antarctic Peninsula and the South Shetland Islands (SSI), where the Bransfield Current (BC) is a relatively war…
Vertical Accumulation of Ozone and Aerosol during the 2016 Southeastern U.S. Wildfires
The vertical accumulation of ozone and aerosol during an episode of the 2016 Southeastern United States Wildfires is analyzed by integrating a regional chemical transport model wi…
Quantifying the deviation of the tropical upper tropospheric temperature response to surface warming from a moist adiab…
Climate models project that tropical warming is amplified aloft in response to increased CO$_2$. Amplification aloft is expected following moist adiabatic adjustment and the Claus…
Estimation of carbon released by mesopelagic fish in the global open ocean using a carbon release model and model fish-…
The role of zooplanktivorous mesopelagic fish in the ocean carbon cycle is attracting increasing attention. However, little information is available regarding the carbon budget of…
Snow microstructure on sea ice- first results from the MOSAiC expedition
We measured during the MOSAiC field experiment the snow microstructure on sea-ice from early winter to the melt season, and continued measurements with the surface scattering laye…
Detailed Spatial Slip Distribution for Short-term Slow Slip Events along the Nankai Subduction Zone, Southwest Japan
Short-term slow slip events (S-SSEs) intensively occur at the transition zone along the Nankai subduction zone, southwest Japan. Because crustal deformation due to a single S-SSE …
Evolution of pitch angle distributions of relativistic electrons during geomagnetic storms: Van Allen Probes Observatio…
We present a study analyzing relativistic and ultra relativistic electron energization and the evolution of pitch angle distributions using data from the Van Allen Probes. We stud…
A Rocket-Triggered Lightning Flash Containing Negative-Positive-Negative Current Polarity Reversal during its Initial S…
A rocket-triggered lightning flash containing negative–positive–negative current polarity reversal during its initial stage is analyzed using multiple synchronized observation dat…
Major, trace, and rare earth element geochemistry of the Oligocene Chiatura stratiform manganese oxide/hydroxide deposi…
The Chiatura deposit is considered one of the world’s largest deposits of metallurgical grade manganese, yet its geochemistry is poorly known, which is the focus of this paper. Th…
Solutions for Subtidal Flow in Channels and Estuaries under Different Integral Constraints
This study builds on Huntley and Ryan (2018) and related prior works on channels and estuaries by considering solutions for the same subtidal dynamics but with alternative integra…
A metamorphic origin for Europa's ocean
Europa likely contains an iron-rich metal core. For it to have formed, temperatures within Europa reached ≳1250 K. At that temperature, accreted chondritic minerals - e.g., carbon…
Effect of buoyant sediment overlying subducting plates on trench geometry: 3D viscoelastic free subduction modeling
Buoyant trench sediment generates an isostatic restoring force, which opposes the slab pull of subducting plates, but the influence of this force on subduction dynamics is poorly …
Complex Numerical Simulation of the U.S. East Coast and Inland Areas using a Coupled Hydrologic, Hydrodynamic and Ocean…
Fluctuations of the total water level in the U.S. East Coast depends on the complex interactions of freshwater flow, tide, storm surge and wave actions. In order to include all ma…
Process-based climate model development harnessing machine learning: I. a calibration tool for parameterization improve…
The development of parameterizations is a major task in the development of weather and climate models. Model improvement has been slow in the past decades, due to the difficulty o…
Simulation of the present and future projection of permafrost on the Qinghai-Tibet Plateau with statistical and machine…
The comprehensive understanding of the occurred changes of permafrost, including the changes of mean annual ground temperature (MAGT) and active layer thickness (ALT), on the Qing…
Energy Conversion within Current Sheets in the Earth's Quasi-parallel Magnetosheath
Shock waves in collisionless plasmas rely on kinetic processes to convert the primary incident bulk flow energy into thermal energy. That conversion is initiated within a thin tra…
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